Loose leaf binder



A. '25? LOTTER LOOSE LEAF BINDER Feb. 16, 1932.

Filed Ma 4', 1928 $9509 -Admlph Elmer...

Patented Feb, 16, 1932 UNITED STATES PATENT OFFICE LDOLPH G. LOTTEB. 01' KILWAUKEE, WIBCGNSIN', ABSIGNOR, BY SHE 816ml,

TO STATIONERS LOOSE Lm COMPANY, OF

most or wrsoonsnv MILWAUKEE, WISCONSIN, A. CORPORA- LQOSE LEAF BINDER Application fled Kay 4, .1928. Serial I0. 275,149.

This invention relates to certain new and useful improvements in binding devices and refers more particularly to means for permanently connecting a plurality of record sheets for convenience in storing or for binding in a suitable covering in such a manner as to prevent the loss or detachment of any of the sheets.

Another object of this invention resides in the provision of an improved device of the character described which may be instantly applied to a plurality of record sheets with out requiring the use of any tools and which when once applied is non-detachable. With the above and other objects in view which will appear as the description proceeds, my invention resides in the novel construction, combi nation and arrangement of parts substantiah 1y as hereinafter described and more particu larly defined by the appended claims, it being understood that such changes in the precise embodiment of the herein-disclosed invention may be made as come within the scope of the claims.

In the accompan ing drawings, I have illustrated one comp ete example of the physical embodiment of my invention constructed according to the best mode I have so far devised for the practical application of the principles thereof, and in which:

Figure 1 is a erspective view of my im proved binding r evice illustrating the parts thereof as separated and about to be applied to a lurality of loose leaves or record sheets;

Figure 2 is a view, partly in end elevation. and partly in transverse section and illustrat ing the binder as applied to the sheets; and

igure 3 is an enlarged, detail, sectional view taken through one of the connecting st units of the device on the plane of the lac fi S of Figure 2.

Referring now more particularly to the accompanying drawings, in which like numerals designate like parts throughout'the several views, the numeral 5 designates a body or pluralit of loose sheets or records which are provi ed with a series of aligned perforations 6 along one marginal edge, to receive the bindin osts, not shown, of a suitable loose-leaf binder structure, not

shown, and certain of the perforations 7 receiving the telescopic post units 8 and 9 of my improved-binding device.

The device forming the subject matter of the present invention consists of a pair of bars 10 provided with apertures 11 adapted to register with the apertures 6 of the record sheets, and with apertures 12 in which the outer ends of the adjacent post sections are secured. The post sections 8 and 9 are preferably of tubular construction, and the bores of the sections 8 are slightly greater than the outside diameters of the sections 9 to telescopically receive the same. The walls of the sections 8 are struck. inwardly at spaced points, as at 13, to provide a series of internal ratchet teeth or sharp edges 14 arranged to oppose movement outwardly of the members 9 when inserted therein.

The sections 8 and 9 are secured to their respective bars 10 by having annular shoulders or ribs 15 crim d or spun inwardly of their outer ends to a at the inner surfaces of the bars adjacent the apertures 12 and having their extreme ends flanged over the outer sur faces of the bars, as at 16, see Figure'3.

When the body of record sheets 5 is complete and it is desired to store it either with or without a cover or when it is desired to maintain the single sheets against detachmentone from the other within a suitable loose-leaf binder structure, the bars 10 are disposed on opposite sides of the body of records and their post sections inserted in the openings 7 thereof. As the bars are forced toward each other to clamp the body of leaves therebetween, the sections 9 telescope withinthe sections 8, the teeth or sharp portions 14 of the sections 8 dragging over the sections 9, but resisting separation of the post sections due to the edges 14 tending to its deeper into the sections 9 upon outward movement thereof, as will be readily apparent from reference to Figure 3. 4

The order of the center post unit is preferably reversed with respect to the outermost units, the section 8, which is the post having the larger diameter, preferably being on the bar 10 carrying the end-most sections 9.

From the foregoing description, taken in connection with the accompanying drawings, it will be readily apparent to those skilled in the art to which an invention of the character described apertains, that I provide a novel and improved binder structure which permanently secures a body of record sheets together, to prevent their becoming lost or detached and which readily lends itself to insertionin a loose-leaf binder structure of any character.-

WVhat I claim as my invention is:

1. A device for permanently binding a plurality of loose sheets having aligned apertures, which consists of a pair of pressure bars, tubular members of different diameters carried byv the bars and enga 'eable in the same apertures in the sheets f iom opposite sides to telescope one in the other, and longitudinally spaced portions struck inwardly from the member of larger diameter to form sharp projections in the bore of said member which bite into the outer walls of the inner memberand restrain movement apart of said members to permanently bind the sheets between the pressure bars.

- 2. Ina device for permanently binding a plurality of loose sheets having aligned apertures, a first tubular member having a bore of fixed diameter, longitudinally spaced portions struck inwardly to form sharp projections in the bore of said member and defining between the innermost edge of said sharp projection and the opposite wall of the bore a portion of minimum diameter, a second tubular member-having an outer diameter smaller than said fixed diameter and larger than said minimum diameter and adapted to be force'dfinto said first named tubular memo 1 ber, said pro ections bltlng into said second named tubular member to prevent withdrawal. p

3. In a device for permanentl binding a pluralityof loose sheets having a igned apertures comprising a pressure bar havmg a pair of lateral edges, a pair of tubular members secured to said pressure bar adjacent the ends thereof, and between said lateral edges, said tubular members having a bore of fixed diameter, longitudinally spaced portions struck inwardly to formsharp projections in the bore of said member and forming between the inner most portion of said sharp projections and the opposite wall of said bore a portion of minimum diameter, a second pressure bar having parallel lateral edges and being parallel to said first pressure bar, a second pair of tubular members attached to the ends of said second bar between the lateral edges thereof and in positions corresponding to said first named tubular member, said second named tubular members having a diameter intermediate sai'd fixed diameter and said minimum diameter and being adapted to be forced into said first named tubular members, said projections biting into said second tubular aligned edges, :1 pair of tubular members having a fixed inside diameter secured to said pressure bar at the opposite ends thereof and intermediate said edges, said tubular members having a plurality of longitudinally spaced portions struck inwardly to form sharp projections in the bores of said members forming between the innermost portions of said sharp projections and the-wall of the bore opposite said portions a portion of minimum diameter, said projections lying in a plane parallel to one of said edges, a second pressure bar disposed parallel to said first pressure bar having a second pair of longitudinal edges, a second pair of tubular members secured to said bar between said edges in longitudinal positions corresponding to said first named tubular members, said second tubular members having a diameter intermediate said minimum diameter and said fixed diameter, a third tubular member disposed on said second named bar and havin a fixed diameter corresponding to the fixed diameter of said first named pair of members, longitudinally spaced portions struck inwardly from said third tubular member to form sharp projections in the bore of said member, formed between the innermost portions of said sharp projections and the wall of the bore opposite said projections, a second portion of minimum diameter, said last named projections lying adjacent the'o'pposite edge from said first named projections, a fourth tubular member secured tosaid first pressure bar intermediate said first named pair of tubular members and in position corresponding to said third tubular member having a diameter intermediate said fixed diameter, and said second minimum diameter, said second named pair of members and said fourth member being adapted to be forced into said first pair and said fourth tubular member, said projections biting into said second pair and said fourth tubular members to prevent withdrawal from the respective tubular members.

In testimony whereof I have hereunto af-' fixed my signature.

ADOLPH G. LOTTER. 

